Building block form



April 27, 1948.

T. L. GREEN BUILDING BLOCK FORM Filed May 31, 1946 FIG. 2

T L Greeh.

INVENTOR,

ATTORNEY Patented Apr. 27, 1948 ,UNITED PATENT 2,440,582v

BUlIiDIN-G BLocK FORM 'llhomasLt Green, Oklahoma. City,. Okla... Application May 31, 194-6 sonar 67353 28 1 claim. (ems-1.19).

My invention relates tot-the art of making or molding building blocks or units; particularly thoseof concrete or other fluid or plastic substance capable of becoming hardened when sufficiently set or cured.

The primeobj'ect ofthe invention is to provide a building uni-t mold= will simultaneously form one or more pairs of complemental; units, said units having meeting shoulders which will interlock and prevent relativedisplacementof the two units solely by virtue of their own weighti Another object-is to provide-a-mold ofithi's class which is capable of embodiment for use: in practically any usual or" present" day block-forming equipment;

A further object is toprovide a mold for the purpose set forth-, in wl-i-i'ch the portion which forms the interlocking shoulders may be made invarious configurations" and various ang esof disposition.

Other objects will be a-pparent from the following description when taken-1n conjunction with the accompanying" single sheet of drawings, wherein:

Figure 1-is apeispective view, partially in section,of a mold whichutilizes atype ofb'lockseparator-made in accordance with the present invention; and

Figure 2 is an explode'dperspective view showing two complete; separated: blocks. and the separator which formed their adiia'cent and interlockable faces;

Like characters of reference designate like partsinboth of the figurese In the drawings: i

The reference numerall indicates, as a whole, an open topped-mold or bOXWhlGI-l maybem'ade of any suitable rigid material. The mold I, as shown in the drawings, is made up of a flat rectangular bottom or floor 2, vertical parallel side walls 3 and 4, and vertical end walls 5 and 6. In the embodiment shown, the walls areillustrated as being integrally joined at the corners of the mold, and the whole seated removably around the floor 2, however, one or more of the walls could well be formed separate from the others, and possibly hinged to the floor or to another wall or walls.

The present embodiment of the mold further 2. mold i so" as.to;providezspaceitbeneanoundifor' re;- ceiving suitable: blohltsfohmingti material; not shown.

The bIO'CKPEOIImiITgI. materiali be: of? any suitable: nature or consistency; so: long; as it is capable of being poured; flowed; tampedg or pressed: into= the mold cavities; and: so; long as: it isthereafter capabl'eiotsetting or'hardeningrinto weight bearing blocks.

The mold; thus: fan described, may be. entirely or partially conventional, and may be of themdividuat type, maybe mountedsimgangs"'-' onserles. or. may bathe-mold of a conventionalv block forming machine.

Incarrying outithezinventiom a separator, partition; or divider 9 isiz-provided row so dividing or separating the mold cavities thatitwd blocks may be simultaneously formed; and for So' shaping the adjacent faces of tlietvm blocks; that they will contiguousl y interlock with each other when properly laidiin a building wallt For the particular mold showm-in the drawings, the: separator 9; is formedi ofia liorizontai bar In to which i are: welded" on; otherwisarigidly-attached the upper: ends ot three: spacedi-idenncal wertically disposed. space dividing s'ept'a- Hi, loiandi m The septa. I12, litand I eaoht-comprises a lower vertical; portion IS, an upper vertical: portion I B which isv ofB-setlaterally from the portion l5 and a" laterally: extending pet tion i l integrally connects the: two= vertical portions I25 and I 5, The portion lg'l is not liorizontalibut ihsteadt lies at an angle-which isil'es'slthan ninety deg-rees with relation to both of the vertital portihnsa The elements l2, l3 and M are so spaced along the bar" l O that wh'enetha separation 9; is placed in the mold-:1 asfshown ih Fig; 1*,- tli'eseptum M resides in the space between the core 1 and the end wall 5, and an element similarly resides in the space between the core 8 and the end wall 6,, with the septum l 3 standing in the space between. the two cores.

The separator 9 is retained in such standing position by notches [8 in the floor 2, which receive the lower ends of the septa l2, l3 and I 4, and notches in the upper ends of the end walls 5 and 6 which receive the outwardly projecting ends of upright wall 22 having three identical laterally projecting webs or cross-walls 23, 24 and 25. Each web has an upwardly facing shoulder 26 which slants upwardly to the outer edge 21 of the web.

Similarly, but not identically, the block 2| has a vertical wall 28 with three identical laterally projecting Webs3li, 3| and 32. The webs each have a downwardly facing shoulder 33 which is complemental' tonne of the upwardly facing shoulders 26 of the block 20.

In the present embodiment, the surfaces of the shoulders 26 and 33 are shown as being formed of reverse curves, but they could well be straight, stepped or notched, in fact they could be made in any configuration which would permit interlocking engagement between them, should the two blocks be laid in a wall With the shoulder surfaces meeting. In other words, the shoulder surfaces can be formed in any manner which will prevent separation of the blocks by virtue of their own weight or' of any weight supported thereon, when the shoulders are inter-engaged.

. It is pointed out that'the separator 9 shown in the. drawingsIis-de'signed for use only in a mold for forming. celletype blocks, and that when non cellular and non-Web blocks are to be formed, the separator may be made of one piece or sheet which provides continuous block forming surfaces.

-It is anticipated that blocks made by the present forming apparatus may be laid with a dividing layer of water-proofing material impinged between: their interlocking surfaces 26 and 33, and that in some instances-the layers may overlap at; their edges. j In such instances, the interlocking surfaces of the blocks may require off-set space for compensating for the over-lapped edge portions of the layers. To this end, it is contemplated that the separatorf-may be off-set to provide such required-space;between the blocks.

Whilethe-embodiment of the invention shown ;in the drawings and described herein discloses a mold inwhich a pair of blocks are simultaneously formed while'theirinterlocking transverse shoulders 2,6 and 33 are facing each other, the mold and separator; could- Well be arranged in such a manner that when the blocks are being formed, the shoulders of both blocks face upwardly. The moldrand separators could also be arranged so that the shoulders of the two blocks face outwardly from. each-other, orso that the blocks lie end to end with shoulders in alignment with each other. I r

In someinstances'the separator can be used as apart of the formingrnachine or equipment, so

4 that a single block can be formed in each compartment of the machine.

It is pointed out that the complemental blocks do not have to be of the same lateral dimension .or thickness in order for them to function properly in a wall. It is therefore contemplated to in some instances so position the separator in the mold that it does not lie an equal distance from the two side wa1ls3 and 4;

In some types of block forming molds or machines, the operation may be such that it would be desirable to so mount the septa l2, l3 and I4 that they can be removed from the machine with one leftin each web or cross-wall of the blocks untilthe' blocks have taken their initial set.

It is pointed out that since the shoulders or shelves g0 and 33 are complemental to each other, the blocks 20 and 2| may be shifted longitudinally with relation to each other when laid in a wall without affecting the inter-locking seal between the blocks.

Obviously, many changes in shapeand configuration of both the septa l2 andthe mold l, or other forming machine, could well be made without defeating the practicability of the device, and I therefore do not wish to be confined to the preferred embodiment shown in the drawings and described herein, further than I am limited by the scope of the appended claim.

I claim:

In apparatus for forming building blocks, the combination with a hollow open topped box having vertical walls and a closed bottom, a central upstanding core in said box supported on said bottom, said core spaced inwardly from said walls to form interconnected vertical channels for receiving block forming material, of a removable septum in at least two of said channels, each septum including: two vertically disposed straight portions laterally spacedand vertically staggered with relation to each other; and a laterally extending portion connectin the adjacent ends of said straight portions, said connecting portion being slanted to form an acute angle with relation to the straight portions.

THOMAS L. GREEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 7 Date 1,690,4 62 Smith NOV. 6, 1928 

